Telephone-transmitter.



W. WRITTEN. TELEPHONE TRANSMITTER. APPLIOATION FILED AUG. u, 190e.

magma Maz?. 15,1916.

MTNESSES @if WMM@ v4 TTOHNE YS preferably rubber, paper or other SObmw 'hon granules employed in the transmitter,

.hy vthegeneral ofieiency oit' tl'ieimnsinitter is i rear j theweighted diaphragm 37.

erisl, provided wih holes 4:2, 43. in order NALTER /VHTTEN, DE SCHENECTADY, NE YRES.

TELEPHNE-TRANSMITTER.

Applieation filed August 1l,

To ZZ whom. t may concern:

lie it knowi thu( l,..V.\L'rER VHIT'MEN, citizen of the United Sintes, :ind s resident oi* Schenectady. in the county oi Schenechul'v und Stain of New York, have invented :l new und improved Telephone-Transinitier. of which he following is a full, Cloer, l sind exact" descripiion.

invention relnies io telephone ironsmiiers :ldap/ind for use in connection Wiih heavy currents.

lllore pnrliculzirly stated my invention eonleniplnies such :i distribution of the carihzit theicurrent used may be employed as fi slowly pulsaiino current'. a. rapidly pulssjng current or :in alternating current, by mei-ely changing the electric connections.

lfiy invention further contemplates vsrions in'ilnoveineni's in oonsirueiionwheregreetly improved.

Reference is to be had to the accompanying drawings forming a part of this specification, in which .similar churacers of reierence indicato corresponding ports in all fie figures.

Figure l is s, fr eginenl'zi-ry central section Jdirough my improved irnnsmiier, showing the saine as used particularly for alternating currents; Fig. 2 is an enlarged section upon the line 4*-4 of Fig. 3, showing how the supplen'ientary diaphragms are moiinied; Figs. 3, e., 5 'and 6 show various of, insin diaphragm against Whieihe sound Vibraiiions are directed. A i

The resin diaphragm 'appears and is connected by n. boit or other se with supplementary diaphragm l Disposed back of this are other dieohiagms providedv with weights 36, "A, end he tween those Weighted diaphregms is zur other supplementary diaphragm 38 made hinner andlighter'than the others. supplementary diaphragm S9 is disposed :it'the At 40 isja barrel of insulating materiel,

teriah'and encircling this barrei is a cyl-j inder 41, preferably of met-alor hard Ina.-

to give this cylinder il the proper vdegreeof resilience and to enon'le rb o it. properly into posiion, t is provided with asini i163 Specification of Leiters Patent.

:is indicated in lthe lower righi: of 2. v

V.fhen the above describedv die .i Weigh down the insin disphreiJ poriing stein is provided with re portion which extends through lie sun# piemcniury diaphragm 39 and is sonnen rigidly to the some by oid of nury i supporting siem eef-l,- is monnied upon lo: plete or support The oarbon or oiher grannies are shovi'n e8, 479, 50, 5l, and are disposed interniedieie the Various supplcnieniiiry diaphragme. linen/ling through fthe cylinder' #il and bei el 40 into che supplsnieniory. die phregin is a screw serving". es a binding post.

or" sulating materia-l. A screw 5i" eiiiendsihrougrh e sleeve 58 of insuleinginaerial and'slso through the oyiinder di und ber rei into i'he suppleio Lary diepl'irogin 38, Another screw 59 e nds,

,ylinder 1li-. and barrel l. nieniury disphragiisi serve as binding poss.

wire S5 is connecled with Dosi and ivih o, primaryWindinoL ivire 62 is connecied i h this primary Winding` and. also with e Wire S3 ihe binding posi, Conneoed Wiih Clie binding posiis a wire 6 4 which les( io e heter i 66. From this battery-s. 65 leeds to the hindi-.n

conneei The screws 5f?, 59

wires 2.

wir.

dass :i

omineeed with une wir@ cznpioy n one i the die ,.r., .y ie? .1, shown t1vely in Figs. 3, e, 85 Wnrch may mso be used with or Withoui straight diaphragme es shown in Fig. 3, 'with diaphragm 7l.

The'opersion of the 'device is follows:

The various wires beingr connecied es indithrough Y into the supplev -iher binding posts are, sho-Wires r9 r Wl f l\ y" a" ou, oei sind are encircled, by. sied/es oo,..o

cated in Fig i 'and The parts 'being other Wise assembleha he action oi' the niechzinislrl shown in Figi may loe readily understood.

The-diaphragins 36, 3? .heilig provided with weig'iis 3G, 37, have considerable iner: snd sire therei'ore-no, readily moved hyp-ille sound. 'i'iioraions "lhe oahersnpplemoniery k wire-62, wire 63, bin

V53, wire 64,

. diaphragme being lighter have comparative freedom of movement, in order to respond to the, action of the sound waves. In order 4V.to facilitate the understanding as to the general action, it may be well to consider the barrel 40` and thelighter supplementary diaphragms 35, 38 and 39 as being movable 4Vwhile'the diaphragme 36, 37, because of their wei hts, are practically stationary.I t isI evi ent that each vibration of the maindiaphragm 33 vcauses the carbon or other granules to be affected differently upon opposite sides of each. of the loaded diaphragms 36, 37- Suppose, for instance, that the center of the diaphragm 33 at a particular instant swings4` to the ri ht, according to Fig. 1.

" y 'Ihe carbon granu es 48, 50 are slightlycompressed for the moment, while the pressure upon the carbon granules 49, 5l is slightly .i relaxed. The circuit may now b e traced as .f]lows: battery A66, wire 65, binding post 54,

`swings so that its center moves to the left accord' to Fi 1, the' circuit thus comindin post 54, supplementary diaphragm 37, car on' granules 5 1, supplementary diaphragm 39, binding post 59, wire 67, wire 62, primar winding 61 (the current now traveling t rough the same in the direction opposite `that in which it first traveled), wire 60, binding post 57, supplementary diaphra m 38, carbon granules 49, supplenien#y tary iaphragm 36, binding ost 53, wire 64,

' backto battery 66. Itwil be noted that durin the last-mentioned movement of" the diaphragm 33 the current passes through the,jcarbon granules 51 and 49. Little or n'ot'zurrent,l however, passes through the carbon granules 48 or 50. This is because' the inain dia hragm, having relieved the pres` sure -of t e carbon granules 48, 50, these -.granules act for the moment as insulators.

f, however, the maindiaphragin 33 swings back in the opposite direction, the reverse condition takes place;to wit, the carbon l granules 48, ,50 become conducting and the carbon lgranules 49, 51 act as insulators.

Each. time this occurs, the direction of the current through the primary winding el p tainin leted being as ollows: battery 66, wireV 65, j E nation of a barrel made of insulating ma- Vhile for the sake of clearness I showl and describe my improved transmitter as made in certain s cial forms, and as contlie materials stated, I dofnot limit mysel to this exact arrangement, as'various changes may be made in the construction. I

and in the materials employed without departing from the spirit/o myA invention.

Having thus described my inventiom I claim as new and desire to secure by Letters Patent:

1. In al transmitter, the combination of a main diaphragm, a plurality of supplementary diaphragme some of said supplementary diaphragms being weighted, 4the weivhted dia phragms being disposed intermediate the other su plementary diaphragms, which are not weighted, and semi-conducting material disposed intermediate said supplemen# tary diaphragm.

In a telephone transmitter -the combination of a cylinder, provided with slots a barrel made of insulating material and 'mounted within said cylinder7 fastening members extending through said. slots and into said barrel, diaphragms mounted with- V in said barrel and engaged by said fastening members, and semi-conducting material disposed intermediate said diaphragms.

3. In a telephone transmitter the combiterial a cylinder encirclinfr said barrel a v v. o i. plurality of diaphragms mounted within said barrel, means for securing some of said diaphragms relatively to said cylinder and for allowing others of said diaphragme comparatively greater freedom of movement relative to said cylinder, and semi-conducting material disposedintermediate of said diajphragm.

4,., 111 a telephone transmitter the combi- `fnation of a barrel, a cylinder encircling the same and providedl with slots, diaphragms mounted within said barrel, screws extend` ing through said slots into said barrelyand diaphragme mounted within said barrel and engaged by said screws.

In 'testimonyfwhereof I have signed.my

naine tothis specification in the presence of two subscribing witnesses.

WALTER WI-IITTEN.

Witnesses: ALEX. FENWICK, y HERBERT A. VAN VRANKEN. A 

